diff options
Diffstat (limited to 'app/nginx/src/os/unix/ngx_process_cycle.c')
| -rw-r--r-- | app/nginx/src/os/unix/ngx_process_cycle.c | 1196 |
1 files changed, 1196 insertions, 0 deletions
diff --git a/app/nginx/src/os/unix/ngx_process_cycle.c b/app/nginx/src/os/unix/ngx_process_cycle.c new file mode 100644 index 0000000..1710ea8 --- /dev/null +++ b/app/nginx/src/os/unix/ngx_process_cycle.c @@ -0,0 +1,1196 @@ + +/* + * Copyright (C) Igor Sysoev + * Copyright (C) Nginx, Inc. + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_event.h> +#include <ngx_channel.h> + + +static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, + ngx_int_t type); +static void ngx_start_cache_manager_processes(ngx_cycle_t *cycle, + ngx_uint_t respawn); +static void ngx_pass_open_channel(ngx_cycle_t *cycle, ngx_channel_t *ch); +static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo); +static ngx_uint_t ngx_reap_children(ngx_cycle_t *cycle); +static void ngx_master_process_exit(ngx_cycle_t *cycle); +static void ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data); +static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker); +static void ngx_worker_process_exit(ngx_cycle_t *cycle); +static void ngx_channel_handler(ngx_event_t *ev); +static void ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data); +static void ngx_cache_manager_process_handler(ngx_event_t *ev); +static void ngx_cache_loader_process_handler(ngx_event_t *ev); + + +ngx_uint_t ngx_process; +ngx_uint_t ngx_worker; +ngx_pid_t ngx_pid; + +sig_atomic_t ngx_reap; +sig_atomic_t ngx_sigio; +sig_atomic_t ngx_sigalrm; +sig_atomic_t ngx_terminate; +sig_atomic_t ngx_quit; +sig_atomic_t ngx_debug_quit; +ngx_uint_t ngx_exiting; +sig_atomic_t ngx_reconfigure; +sig_atomic_t ngx_reopen; + +sig_atomic_t ngx_change_binary; +ngx_pid_t ngx_new_binary; +ngx_uint_t ngx_inherited; +ngx_uint_t ngx_daemonized; + +sig_atomic_t ngx_noaccept; +ngx_uint_t ngx_noaccepting; +ngx_uint_t ngx_restart; + + +static u_char master_process[] = "master process"; + + +static ngx_cache_manager_ctx_t ngx_cache_manager_ctx = { + ngx_cache_manager_process_handler, "cache manager process", 0 +}; + +static ngx_cache_manager_ctx_t ngx_cache_loader_ctx = { + ngx_cache_loader_process_handler, "cache loader process", 60000 +}; + + +static ngx_cycle_t ngx_exit_cycle; +static ngx_log_t ngx_exit_log; +static ngx_open_file_t ngx_exit_log_file; + + +void +ngx_master_process_cycle(ngx_cycle_t *cycle) +{ + char *title; + u_char *p; + size_t size; + ngx_int_t i; + ngx_uint_t n, sigio; + sigset_t set; + struct itimerval itv; + ngx_uint_t live; + ngx_msec_t delay; + ngx_listening_t *ls; + ngx_core_conf_t *ccf; + + sigemptyset(&set); + sigaddset(&set, SIGCHLD); + sigaddset(&set, SIGALRM); + sigaddset(&set, SIGIO); + sigaddset(&set, SIGINT); + sigaddset(&set, ngx_signal_value(NGX_RECONFIGURE_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_REOPEN_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_NOACCEPT_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_TERMINATE_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + sigaddset(&set, ngx_signal_value(NGX_CHANGEBIN_SIGNAL)); + + if (sigprocmask(SIG_BLOCK, &set, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "sigprocmask() failed"); + } + + sigemptyset(&set); + + + size = sizeof(master_process); + + for (i = 0; i < ngx_argc; i++) { + size += ngx_strlen(ngx_argv[i]) + 1; + } + + title = ngx_pnalloc(cycle->pool, size); + if (title == NULL) { + /* fatal */ + exit(2); + } + + p = ngx_cpymem(title, master_process, sizeof(master_process) - 1); + for (i = 0; i < ngx_argc; i++) { + *p++ = ' '; + p = ngx_cpystrn(p, (u_char *) ngx_argv[i], size); + } + + ngx_setproctitle(title); + + + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); + + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_RESPAWN); + ngx_start_cache_manager_processes(cycle, 0); + + ngx_new_binary = 0; + delay = 0; + sigio = 0; + live = 1; + + for ( ;; ) { + if (delay) { + if (ngx_sigalrm) { + sigio = 0; + delay *= 2; + ngx_sigalrm = 0; + } + + ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "termination cycle: %M", delay); + + itv.it_interval.tv_sec = 0; + itv.it_interval.tv_usec = 0; + itv.it_value.tv_sec = delay / 1000; + itv.it_value.tv_usec = (delay % 1000 ) * 1000; + + if (setitimer(ITIMER_REAL, &itv, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "setitimer() failed"); + } + } + + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "sigsuspend"); + + sigsuspend(&set); + + ngx_time_update(); + + ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "wake up, sigio %i", sigio); + + if (ngx_reap) { + ngx_reap = 0; + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "reap children"); + + live = ngx_reap_children(cycle); + } + + if (!live && (ngx_terminate || ngx_quit)) { + ngx_master_process_exit(cycle); + } + + if (ngx_terminate) { + if (delay == 0) { + delay = 50; + } + + if (sigio) { + sigio--; + continue; + } + + sigio = ccf->worker_processes + 2 /* cache processes */; + + if (delay > 1000) { + ngx_signal_worker_processes(cycle, SIGKILL); + } else { + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_TERMINATE_SIGNAL)); + } + + continue; + } + + if (ngx_quit) { + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + + ls = cycle->listening.elts; + for (n = 0; n < cycle->listening.nelts; n++) { + if (ngx_close_socket(ls[n].fd) == -1) { + ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_socket_errno, + ngx_close_socket_n " %V failed", + &ls[n].addr_text); + } + } + cycle->listening.nelts = 0; + + continue; + } + + if (ngx_reconfigure) { + ngx_reconfigure = 0; + + if (ngx_new_binary) { + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_RESPAWN); + ngx_start_cache_manager_processes(cycle, 0); + ngx_noaccepting = 0; + + continue; + } + + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring"); + + cycle = ngx_init_cycle(cycle); + if (cycle == NULL) { + cycle = (ngx_cycle_t *) ngx_cycle; + continue; + } + + ngx_cycle = cycle; + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, + ngx_core_module); + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_JUST_RESPAWN); + ngx_start_cache_manager_processes(cycle, 1); + + /* allow new processes to start */ + ngx_msleep(100); + + live = 1; + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + } + + if (ngx_restart) { + ngx_restart = 0; + ngx_start_worker_processes(cycle, ccf->worker_processes, + NGX_PROCESS_RESPAWN); + ngx_start_cache_manager_processes(cycle, 0); + live = 1; + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); + ngx_reopen_files(cycle, ccf->user); + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_REOPEN_SIGNAL)); + } + + if (ngx_change_binary) { + ngx_change_binary = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "changing binary"); + ngx_new_binary = ngx_exec_new_binary(cycle, ngx_argv); + } + + if (ngx_noaccept) { + ngx_noaccept = 0; + ngx_noaccepting = 1; + ngx_signal_worker_processes(cycle, + ngx_signal_value(NGX_SHUTDOWN_SIGNAL)); + } + } +} + + +void +ngx_single_process_cycle(ngx_cycle_t *cycle) +{ + ngx_uint_t i; + + if (ngx_set_environment(cycle, NULL) == NULL) { + /* fatal */ + exit(2); + } + + for (i = 0; cycle->modules[i]; i++) { + if (cycle->modules[i]->init_process) { + if (cycle->modules[i]->init_process(cycle) == NGX_ERROR) { + /* fatal */ + exit(2); + } + } + } + + for ( ;; ) { + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); + + ngx_process_events_and_timers(cycle); + + if (ngx_terminate || ngx_quit) { + + for (i = 0; cycle->modules[i]; i++) { + if (cycle->modules[i]->exit_process) { + cycle->modules[i]->exit_process(cycle); + } + } + + ngx_master_process_exit(cycle); + } + + if (ngx_reconfigure) { + ngx_reconfigure = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring"); + + cycle = ngx_init_cycle(cycle); + if (cycle == NULL) { + cycle = (ngx_cycle_t *) ngx_cycle; + continue; + } + + ngx_cycle = cycle; + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); + ngx_reopen_files(cycle, (ngx_uid_t) -1); + } + } +} + + +static void +ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n, ngx_int_t type) +{ + ngx_int_t i; + ngx_channel_t ch; + + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "start worker processes"); + + ngx_memzero(&ch, sizeof(ngx_channel_t)); + + ch.command = NGX_CMD_OPEN_CHANNEL; + + for (i = 0; i < n; i++) { + + ngx_spawn_process(cycle, ngx_worker_process_cycle, + (void *) (intptr_t) i, "worker process", type); + + ch.pid = ngx_processes[ngx_process_slot].pid; + ch.slot = ngx_process_slot; + ch.fd = ngx_processes[ngx_process_slot].channel[0]; + + ngx_pass_open_channel(cycle, &ch); + } +} + + +static void +ngx_start_cache_manager_processes(ngx_cycle_t *cycle, ngx_uint_t respawn) +{ + ngx_uint_t i, manager, loader; + ngx_path_t **path; + ngx_channel_t ch; + + manager = 0; + loader = 0; + + path = ngx_cycle->paths.elts; + for (i = 0; i < ngx_cycle->paths.nelts; i++) { + + if (path[i]->manager) { + manager = 1; + } + + if (path[i]->loader) { + loader = 1; + } + } + + if (manager == 0) { + return; + } + + ngx_spawn_process(cycle, ngx_cache_manager_process_cycle, + &ngx_cache_manager_ctx, "cache manager process", + respawn ? NGX_PROCESS_JUST_RESPAWN : NGX_PROCESS_RESPAWN); + + ngx_memzero(&ch, sizeof(ngx_channel_t)); + + ch.command = NGX_CMD_OPEN_CHANNEL; + ch.pid = ngx_processes[ngx_process_slot].pid; + ch.slot = ngx_process_slot; + ch.fd = ngx_processes[ngx_process_slot].channel[0]; + + ngx_pass_open_channel(cycle, &ch); + + if (loader == 0) { + return; + } + + ngx_spawn_process(cycle, ngx_cache_manager_process_cycle, + &ngx_cache_loader_ctx, "cache loader process", + respawn ? NGX_PROCESS_JUST_SPAWN : NGX_PROCESS_NORESPAWN); + + ch.command = NGX_CMD_OPEN_CHANNEL; + ch.pid = ngx_processes[ngx_process_slot].pid; + ch.slot = ngx_process_slot; + ch.fd = ngx_processes[ngx_process_slot].channel[0]; + + ngx_pass_open_channel(cycle, &ch); +} + + +static void +ngx_pass_open_channel(ngx_cycle_t *cycle, ngx_channel_t *ch) +{ + ngx_int_t i; + + for (i = 0; i < ngx_last_process; i++) { + + if (i == ngx_process_slot + || ngx_processes[i].pid == -1 + || ngx_processes[i].channel[0] == -1) + { + continue; + } + + ngx_log_debug6(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "pass channel s:%i pid:%P fd:%d to s:%i pid:%P fd:%d", + ch->slot, ch->pid, ch->fd, + i, ngx_processes[i].pid, + ngx_processes[i].channel[0]); + + /* TODO: NGX_AGAIN */ + + ngx_write_channel(ngx_processes[i].channel[0], + ch, sizeof(ngx_channel_t), cycle->log); + } +} + + +static void +ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo) +{ + ngx_int_t i; + ngx_err_t err; + ngx_channel_t ch; + + ngx_memzero(&ch, sizeof(ngx_channel_t)); + +#if (NGX_BROKEN_SCM_RIGHTS) + + ch.command = 0; + +#else + + switch (signo) { + + case ngx_signal_value(NGX_SHUTDOWN_SIGNAL): + ch.command = NGX_CMD_QUIT; + break; + + case ngx_signal_value(NGX_TERMINATE_SIGNAL): + ch.command = NGX_CMD_TERMINATE; + break; + + case ngx_signal_value(NGX_REOPEN_SIGNAL): + ch.command = NGX_CMD_REOPEN; + break; + + default: + ch.command = 0; + } + +#endif + + ch.fd = -1; + + + for (i = 0; i < ngx_last_process; i++) { + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "child: %i %P e:%d t:%d d:%d r:%d j:%d", + i, + ngx_processes[i].pid, + ngx_processes[i].exiting, + ngx_processes[i].exited, + ngx_processes[i].detached, + ngx_processes[i].respawn, + ngx_processes[i].just_spawn); + + if (ngx_processes[i].detached || ngx_processes[i].pid == -1) { + continue; + } + + if (ngx_processes[i].just_spawn) { + ngx_processes[i].just_spawn = 0; + continue; + } + + if (ngx_processes[i].exiting + && signo == ngx_signal_value(NGX_SHUTDOWN_SIGNAL)) + { + continue; + } + + if (ch.command) { + if (ngx_write_channel(ngx_processes[i].channel[0], + &ch, sizeof(ngx_channel_t), cycle->log) + == NGX_OK) + { + if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { + ngx_processes[i].exiting = 1; + } + + continue; + } + } + + ngx_log_debug2(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "kill (%P, %d)", ngx_processes[i].pid, signo); + + if (kill(ngx_processes[i].pid, signo) == -1) { + err = ngx_errno; + ngx_log_error(NGX_LOG_ALERT, cycle->log, err, + "kill(%P, %d) failed", ngx_processes[i].pid, signo); + + if (err == NGX_ESRCH) { + ngx_processes[i].exited = 1; + ngx_processes[i].exiting = 0; + ngx_reap = 1; + } + + continue; + } + + if (signo != ngx_signal_value(NGX_REOPEN_SIGNAL)) { + ngx_processes[i].exiting = 1; + } + } +} + + +static ngx_uint_t +ngx_reap_children(ngx_cycle_t *cycle) +{ + ngx_int_t i, n; + ngx_uint_t live; + ngx_channel_t ch; + ngx_core_conf_t *ccf; + + ngx_memzero(&ch, sizeof(ngx_channel_t)); + + ch.command = NGX_CMD_CLOSE_CHANNEL; + ch.fd = -1; + + live = 0; + for (i = 0; i < ngx_last_process; i++) { + + ngx_log_debug7(NGX_LOG_DEBUG_EVENT, cycle->log, 0, + "child: %i %P e:%d t:%d d:%d r:%d j:%d", + i, + ngx_processes[i].pid, + ngx_processes[i].exiting, + ngx_processes[i].exited, + ngx_processes[i].detached, + ngx_processes[i].respawn, + ngx_processes[i].just_spawn); + + if (ngx_processes[i].pid == -1) { + continue; + } + + if (ngx_processes[i].exited) { + + if (!ngx_processes[i].detached) { + ngx_close_channel(ngx_processes[i].channel, cycle->log); + + ngx_processes[i].channel[0] = -1; + ngx_processes[i].channel[1] = -1; + + ch.pid = ngx_processes[i].pid; + ch.slot = i; + + for (n = 0; n < ngx_last_process; n++) { + if (ngx_processes[n].exited + || ngx_processes[n].pid == -1 + || ngx_processes[n].channel[0] == -1) + { + continue; + } + + ngx_log_debug3(NGX_LOG_DEBUG_CORE, cycle->log, 0, + "pass close channel s:%i pid:%P to:%P", + ch.slot, ch.pid, ngx_processes[n].pid); + + /* TODO: NGX_AGAIN */ + + ngx_write_channel(ngx_processes[n].channel[0], + &ch, sizeof(ngx_channel_t), cycle->log); + } + } + + if (ngx_processes[i].respawn + && !ngx_processes[i].exiting + && !ngx_terminate + && !ngx_quit) + { + if (ngx_spawn_process(cycle, ngx_processes[i].proc, + ngx_processes[i].data, + ngx_processes[i].name, i) + == NGX_INVALID_PID) + { + ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, + "could not respawn %s", + ngx_processes[i].name); + continue; + } + + + ch.command = NGX_CMD_OPEN_CHANNEL; + ch.pid = ngx_processes[ngx_process_slot].pid; + ch.slot = ngx_process_slot; + ch.fd = ngx_processes[ngx_process_slot].channel[0]; + + ngx_pass_open_channel(cycle, &ch); + + live = 1; + + continue; + } + + if (ngx_processes[i].pid == ngx_new_binary) { + + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, + ngx_core_module); + + if (ngx_rename_file((char *) ccf->oldpid.data, + (char *) ccf->pid.data) + == NGX_FILE_ERROR) + { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + ngx_rename_file_n " %s back to %s failed " + "after the new binary process \"%s\" exited", + ccf->oldpid.data, ccf->pid.data, ngx_argv[0]); + } + + ngx_new_binary = 0; + if (ngx_noaccepting) { + ngx_restart = 1; + ngx_noaccepting = 0; + } + } + + if (i == ngx_last_process - 1) { + ngx_last_process--; + + } else { + ngx_processes[i].pid = -1; + } + + } else if (ngx_processes[i].exiting || !ngx_processes[i].detached) { + live = 1; + } + } + + return live; +} + + +static void +ngx_master_process_exit(ngx_cycle_t *cycle) +{ + ngx_uint_t i; + + ngx_delete_pidfile(cycle); + + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exit"); + + for (i = 0; cycle->modules[i]; i++) { + if (cycle->modules[i]->exit_master) { + cycle->modules[i]->exit_master(cycle); + } + } + + ngx_close_listening_sockets(cycle); + + /* + * Copy ngx_cycle->log related data to the special static exit cycle, + * log, and log file structures enough to allow a signal handler to log. + * The handler may be called when standard ngx_cycle->log allocated from + * ngx_cycle->pool is already destroyed. + */ + + + ngx_exit_log = *ngx_log_get_file_log(ngx_cycle->log); + + ngx_exit_log_file.fd = ngx_exit_log.file->fd; + ngx_exit_log.file = &ngx_exit_log_file; + ngx_exit_log.next = NULL; + ngx_exit_log.writer = NULL; + + ngx_exit_cycle.log = &ngx_exit_log; + ngx_exit_cycle.files = ngx_cycle->files; + ngx_exit_cycle.files_n = ngx_cycle->files_n; + ngx_cycle = &ngx_exit_cycle; + + ngx_destroy_pool(cycle->pool); + + exit(0); +} + + +static void +ngx_worker_process_cycle(ngx_cycle_t *cycle, void *data) +{ + ngx_int_t worker = (intptr_t) data; + + ngx_process = NGX_PROCESS_WORKER; + ngx_worker = worker; + + ngx_worker_process_init(cycle, worker); + + ngx_setproctitle("worker process"); + + for ( ;; ) { + + if (ngx_exiting) { + if (ngx_event_no_timers_left() == NGX_OK) { + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting"); + ngx_worker_process_exit(cycle); + } + } + + ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle"); + + ngx_process_events_and_timers(cycle); + + if (ngx_terminate) { + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting"); + ngx_worker_process_exit(cycle); + } + + if (ngx_quit) { + ngx_quit = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, + "gracefully shutting down"); + ngx_setproctitle("worker process is shutting down"); + + if (!ngx_exiting) { + ngx_exiting = 1; + ngx_set_shutdown_timer(cycle); + ngx_close_listening_sockets(cycle); + ngx_close_idle_connections(cycle); + } + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); + ngx_reopen_files(cycle, -1); + } + } +} + + +static void +ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker) +{ + sigset_t set; + ngx_int_t n; + ngx_time_t *tp; + ngx_uint_t i; + ngx_cpuset_t *cpu_affinity; + struct rlimit rlmt; + ngx_core_conf_t *ccf; + ngx_listening_t *ls; + + if (ngx_set_environment(cycle, NULL) == NULL) { + /* fatal */ + exit(2); + } + + ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); + + if (worker >= 0 && ccf->priority != 0) { + if (setpriority(PRIO_PROCESS, 0, ccf->priority) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "setpriority(%d) failed", ccf->priority); + } + } + + if (ccf->rlimit_nofile != NGX_CONF_UNSET) { + rlmt.rlim_cur = (rlim_t) ccf->rlimit_nofile; + rlmt.rlim_max = (rlim_t) ccf->rlimit_nofile; + + if (setrlimit(RLIMIT_NOFILE, &rlmt) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "setrlimit(RLIMIT_NOFILE, %i) failed", + ccf->rlimit_nofile); + } + } + + if (ccf->rlimit_core != NGX_CONF_UNSET) { + rlmt.rlim_cur = (rlim_t) ccf->rlimit_core; + rlmt.rlim_max = (rlim_t) ccf->rlimit_core; + + if (setrlimit(RLIMIT_CORE, &rlmt) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "setrlimit(RLIMIT_CORE, %O) failed", + ccf->rlimit_core); + } + } + + if (geteuid() == 0) { + if (setgid(ccf->group) == -1) { + ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, + "setgid(%d) failed", ccf->group); + /* fatal */ + exit(2); + } + + if (initgroups(ccf->username, ccf->group) == -1) { + ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, + "initgroups(%s, %d) failed", + ccf->username, ccf->group); + } + + if (setuid(ccf->user) == -1) { + ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, + "setuid(%d) failed", ccf->user); + /* fatal */ + exit(2); + } + } + + if (worker >= 0) { + cpu_affinity = ngx_get_cpu_affinity(worker); + + if (cpu_affinity) { + ngx_setaffinity(cpu_affinity, cycle->log); + } + } + +#if (NGX_HAVE_PR_SET_DUMPABLE) + + /* allow coredump after setuid() in Linux 2.4.x */ + + if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "prctl(PR_SET_DUMPABLE) failed"); + } + +#endif + + if (ccf->working_directory.len) { + if (chdir((char *) ccf->working_directory.data) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "chdir(\"%s\") failed", ccf->working_directory.data); + /* fatal */ + exit(2); + } + } + + sigemptyset(&set); + + if (sigprocmask(SIG_SETMASK, &set, NULL) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "sigprocmask() failed"); + } + + tp = ngx_timeofday(); + srandom(((unsigned) ngx_pid << 16) ^ tp->sec ^ tp->msec); + + /* + * disable deleting previous events for the listening sockets because + * in the worker processes there are no events at all at this point + */ + ls = cycle->listening.elts; + for (i = 0; i < cycle->listening.nelts; i++) { + ls[i].previous = NULL; + } + + for (i = 0; cycle->modules[i]; i++) { + if (cycle->modules[i]->init_process) { + if (cycle->modules[i]->init_process(cycle) == NGX_ERROR) { + /* fatal */ + exit(2); + } + } + } + + for (n = 0; n < ngx_last_process; n++) { + + if (ngx_processes[n].pid == -1) { + continue; + } + + if (n == ngx_process_slot) { + continue; + } + + if (ngx_processes[n].channel[1] == -1) { + continue; + } + + if (close(ngx_processes[n].channel[1]) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "close() channel failed"); + } + } + + if (close(ngx_processes[ngx_process_slot].channel[0]) == -1) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno, + "close() channel failed"); + } + +#if 0 + ngx_last_process = 0; +#endif + + if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT, + ngx_channel_handler) + == NGX_ERROR) + { + /* fatal */ + exit(2); + } +} + + +static void +ngx_worker_process_exit(ngx_cycle_t *cycle) +{ + ngx_uint_t i; + ngx_connection_t *c; + + for (i = 0; cycle->modules[i]; i++) { + if (cycle->modules[i]->exit_process) { + cycle->modules[i]->exit_process(cycle); + } + } + + if (ngx_exiting) { + c = cycle->connections; + for (i = 0; i < cycle->connection_n; i++) { + if (c[i].fd != -1 + && c[i].read + && !c[i].read->accept + && !c[i].read->channel + && !c[i].read->resolver) + { + ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, + "*%uA open socket #%d left in connection %ui", + c[i].number, c[i].fd, i); + ngx_debug_quit = 1; + } + } + + if (ngx_debug_quit) { + ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, "aborting"); + ngx_debug_point(); + } + } + + /* + * Copy ngx_cycle->log related data to the special static exit cycle, + * log, and log file structures enough to allow a signal handler to log. + * The handler may be called when standard ngx_cycle->log allocated from + * ngx_cycle->pool is already destroyed. + */ + + ngx_exit_log = *ngx_log_get_file_log(ngx_cycle->log); + + ngx_exit_log_file.fd = ngx_exit_log.file->fd; + ngx_exit_log.file = &ngx_exit_log_file; + ngx_exit_log.next = NULL; + ngx_exit_log.writer = NULL; + + ngx_exit_cycle.log = &ngx_exit_log; + ngx_exit_cycle.files = ngx_cycle->files; + ngx_exit_cycle.files_n = ngx_cycle->files_n; + ngx_cycle = &ngx_exit_cycle; + + ngx_destroy_pool(cycle->pool); + + ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, "exit"); + + exit(0); +} + + +static void +ngx_channel_handler(ngx_event_t *ev) +{ + ngx_int_t n; + ngx_channel_t ch; + ngx_connection_t *c; + + if (ev->timedout) { + ev->timedout = 0; + return; + } + + c = ev->data; + + ngx_log_debug0(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel handler"); + + for ( ;; ) { + + n = ngx_read_channel(c->fd, &ch, sizeof(ngx_channel_t), ev->log); + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "channel: %i", n); + + if (n == NGX_ERROR) { + + if (ngx_event_flags & NGX_USE_EPOLL_EVENT) { + ngx_del_conn(c, 0); + } + + ngx_close_connection(c); + return; + } + + if (ngx_event_flags & NGX_USE_EVENTPORT_EVENT) { + if (ngx_add_event(ev, NGX_READ_EVENT, 0) == NGX_ERROR) { + return; + } + } + + if (n == NGX_AGAIN) { + return; + } + + ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, + "channel command: %ui", ch.command); + + switch (ch.command) { + + case NGX_CMD_QUIT: + ngx_quit = 1; + break; + + case NGX_CMD_TERMINATE: + ngx_terminate = 1; + break; + + case NGX_CMD_REOPEN: + ngx_reopen = 1; + break; + + case NGX_CMD_OPEN_CHANNEL: + + ngx_log_debug3(NGX_LOG_DEBUG_CORE, ev->log, 0, + "get channel s:%i pid:%P fd:%d", + ch.slot, ch.pid, ch.fd); + + ngx_processes[ch.slot].pid = ch.pid; + ngx_processes[ch.slot].channel[0] = ch.fd; + break; + + case NGX_CMD_CLOSE_CHANNEL: + + ngx_log_debug4(NGX_LOG_DEBUG_CORE, ev->log, 0, + "close channel s:%i pid:%P our:%P fd:%d", + ch.slot, ch.pid, ngx_processes[ch.slot].pid, + ngx_processes[ch.slot].channel[0]); + + if (close(ngx_processes[ch.slot].channel[0]) == -1) { + ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno, + "close() channel failed"); + } + + ngx_processes[ch.slot].channel[0] = -1; + break; + } + } +} + + +static void +ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data) +{ + ngx_cache_manager_ctx_t *ctx = data; + + void *ident[4]; + ngx_event_t ev; + + /* + * Set correct process type since closing listening Unix domain socket + * in a master process also removes the Unix domain socket file. + */ + ngx_process = NGX_PROCESS_HELPER; + + ngx_close_listening_sockets(cycle); + + /* Set a moderate number of connections for a helper process. */ + cycle->connection_n = 512; + + ngx_worker_process_init(cycle, -1); + + ngx_memzero(&ev, sizeof(ngx_event_t)); + ev.handler = ctx->handler; + ev.data = ident; + ev.log = cycle->log; + ident[3] = (void *) -1; + + ngx_use_accept_mutex = 0; + + ngx_setproctitle(ctx->name); + + ngx_add_timer(&ev, ctx->delay); + + for ( ;; ) { + + if (ngx_terminate || ngx_quit) { + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting"); + exit(0); + } + + if (ngx_reopen) { + ngx_reopen = 0; + ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs"); + ngx_reopen_files(cycle, -1); + } + + ngx_process_events_and_timers(cycle); + } +} + + +static void +ngx_cache_manager_process_handler(ngx_event_t *ev) +{ + ngx_uint_t i; + ngx_msec_t next, n; + ngx_path_t **path; + + next = 60 * 60 * 1000; + + path = ngx_cycle->paths.elts; + for (i = 0; i < ngx_cycle->paths.nelts; i++) { + + if (path[i]->manager) { + n = path[i]->manager(path[i]->data); + + next = (n <= next) ? n : next; + + ngx_time_update(); + } + } + + if (next == 0) { + next = 1; + } + + ngx_add_timer(ev, next); +} + + +static void +ngx_cache_loader_process_handler(ngx_event_t *ev) +{ + ngx_uint_t i; + ngx_path_t **path; + ngx_cycle_t *cycle; + + cycle = (ngx_cycle_t *) ngx_cycle; + + path = cycle->paths.elts; + for (i = 0; i < cycle->paths.nelts; i++) { + + if (ngx_terminate || ngx_quit) { + break; + } + + if (path[i]->loader) { + path[i]->loader(path[i]->data); + ngx_time_update(); + } + } + + exit(0); +} |